Double Block & Bleed Valve
A VALVE IS A DEVICE THAT REGULATES, DIRECTS OR CONTROLS THE FLOW OF A FLUID BY OPENING, CLOSING, OR PARTIALLY OBSTRUCTING VARIOUS PASSAGEWAYS.
Valves are technically valves fittings, but are usually discussed as a separate category.
Double Block & Bleed Valve
Spec.
– Reduced potential leak paths with primary & secondary isolation in one valve.
– Compact ball/OS&Y/needle valve assembly in one DBB.
– Flange construction as per the requirements of ASME B16.5
– NPT threaded connection to ANSI/ASME B1.20.1
– Pressure rations as per ASME B16.34 Class 150 thru 2500.
– Wetted components of Sour gas service valve are selected as per the requirements of NACE MR0175/ISO 15156
– Fire tested as per BS 6755 part 2/API607
– Anti-Static Device is set between the stem and ball.
Monoflange
Spec.
– ASME B16.5 flanged inlet connections ½” to 2” sizes
– Standard ½” NPT female outlet
– Bleed port ½”NTP female with Hex Plug is standard
– OS&Y with graphite packing is standard, optional PTFE
– Needle valve with PTFE packing is standard, optional Graphite.
– Optional fire safe design to BS6755 part 2
– Optional NACE certification.